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SubjectRe: [V6 PATCH 0/7] ACPI: Introduce support for _CCA object
Thank you.

Suravee

On 6/15/15 18:24, Rafael J. Wysocki wrote:
> On Wednesday, June 10, 2015 11:08:51 AM Suravee Suthikulpanit wrote:
>> This patch series introduce support for _CCA object, which is currently
>> used mainly by ARM64 platform to specify DMA coherency attribute for
>> devices when booting with ACPI.
>>
>> A copy of ACPIv6 can be found here:
>> http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf
>>
>> This patch also introduces a new APIS:
>> 1. acpi_check_dma() as part of ACPI API.
>> 2. device_dma_is_coherent() as part of unified device property API.
>>
>> This simplifies the logic in device drivers to determine device coherency
>> attribute regardless of booting with DT vs ACPI.
>>
>> This has been tested on AMD-Seattle platform, which implements _CCA
>> object as described in the AMD Opteron A1100 Series Processor ACPI Porting Guide:
>>
>> http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2012/10/Seattle_ACPI_Guide.pdf
>>
>> Changes from V5 (https://lkml.org/lkml/2015/5/20/1033):
>> * Fix build error in the megaraid and ufs driver
>> (reported by Mark Salter)
>>
>> Changes from V4 (https://lkml.org/lkml/2015/5/15/669):
>> * Patch1:
>> - Move the arch_setup_dma_ops() call from acpi_create_platform_device()
>> to acpi_bind_one() to support other bus types (per Rafael).
>> - Rename acpi_device_flags.is_coherent to acpi_device_flags.coherent_dma.
>> (per Rafael)
>> - Refactor acpi_dma_is_supported() and acpi_dma_is_coherent() to
>> acpi_check_dma() to simplify the new interface.
>> - Only support _CCA=1 for now. See acpi_check_dma() (per Arnd and Catalin)
>> * Patch2:
>> - Add acked-by Catalin.
>> * Patch3:
>> - Use ACPI_COMPANION() instead of acpi_node().
>> - Remove has_acpi_companion() check since already done by acpi_node().
>> (per Will)
>> * Remove the patch "Generic function for setting up PCI device DMA coherency"
>> introduced in V4. (per Bjorn)
>>
>> Changes from V3 (https://lkml.org/lkml/2015/5/7/1004):
>> * Remove ARCH64_SUPPORT_ACPI_CCA_ZERO and just use CONFIG_ARM64.
>> (per Catalin and Rafael)
>> * Do not need to call arch_setup_dma_ops() for acpi_device->dev.
>> (per Rafael)
>> * [3/6] (New) We also need to call arch_setup_dma_ops() for pci
>> devices and check the CCA of the host bridge. Similar logic
>> exists for OF. So, I refactor of_pci_dma_configure() to
>> the more generic version pci_dma_configure(), and add support
>> for ACPI.
>>
>> Changes from V2 (https://lkml.org/lkml/2015/5/5/510):
>> * Reword ACPI_MUST_HAVE_CCA to ACPI_CCA_REQUIRED (per Rafael)
>> * Reword ACPI_SUPPORT_CCA_ZERO to ARCH64_SUPPORT_ACPI_CCA_ZERO
>> (per Rafael and Arnd)
>> * Misc code styling clean up (per Rafael)
>> * Only print missing _CCA warning message in debug mode.
>> * Refactor logic in acpi_setup_device_dma() into
>> if acpi_dma_is_supported() then call arch_setup_dma_ops().
>> * Do not allocate device dma_mask if !acpi_dma_is_supported()
>> (per Arnd).
>> * Re-use the dummy functions with the same signature.
>>
>> Changes from V1 (https://lkml.org/lkml/2015/4/29/290):
>> * Remove supports for 32-bit ARM since doesn't currently
>> supporting ACPI (Per Catalin suggestions.)
>> * Do not call arch_setup_dma_ops() and when _CCA is missing.
>> (per Arnd suggestion)
>> * Add CONFIG_ACPI_SUPPORT_CCA_ZERO kernel config flag to
>> allow architectures to specify the behavior when _CCA=0.
>> * Add dummy_dma_ops for ARM64 (per Catalin suggestions).
>> * Fixed build error when ACPI is not configured by defining
>> acpi_dma_is_coherent() for when CONFIG_ACPI is not set.
>> * Introduce device_dma_is_coherent().
>> * Use device_dma_is_coherent in crypto/ccp and amd-xgbe driver.
>>
>> Changes from RFC: (https://lkml.org/lkml/2015/4/1/389)
>> * New logic for deriving and propagating coherent attribute from
>> parent devices. (by Mark)
>> * Introducing acpi_dma_is_coherent() API (Per Tom suggestion)
>> * Introducing CONFIG_ACPI_MUST_HAVE_CCA kernel configuration.
>> * Rebased to linux-4.1-rc1
>>
>> Suravee Suthikulpanit (7):
>> ACPI / scan: Parse _CCA and setup device coherency
>> arm64 : Introduce support for ACPI _CCA object
>> device property: Introduces device_dma_is_coherent()
>> crypto: ccp - Unify coherency checking logic with
>> device_dma_is_coherent()
>> amd-xgbe: Unify coherency checking logic with device_dma_is_coherent()
>> megaraid_sas: fix TRUE and FALSE re-define build error
>> ufs: fix TRUE and FALSE re-define build error
>>
>> arch/arm64/Kconfig | 1 +
>> arch/arm64/include/asm/dma-mapping.h | 18 +++++-
>> arch/arm64/mm/dma-mapping.c | 92 +++++++++++++++++++++++++++++++
>> drivers/acpi/Kconfig | 3 +
>> drivers/acpi/acpi_platform.c | 2 +-
>> drivers/acpi/glue.c | 5 ++
>> drivers/acpi/scan.c | 35 ++++++++++++
>> drivers/base/property.c | 14 +++++
>> drivers/crypto/ccp/ccp-platform.c | 60 +-------------------
>> drivers/net/ethernet/amd/xgbe/xgbe-main.c | 27 +--------
>> drivers/scsi/megaraid/megaraid_sas_fp.c | 8 +++
>> drivers/scsi/ufs/unipro.h | 8 +++
>> include/acpi/acpi_bus.h | 37 ++++++++++++-
>> include/linux/acpi.h | 5 ++
>> include/linux/property.h | 2 +
>> 15 files changed, 228 insertions(+), 89 deletions(-)
>
> I've queued up the series for 4.2, thanks!
>
>


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